static resolveProxy()

in lib/http_utils.ts [68:99]

• 23 lines of code
• 8 McCabe index (conditional complexity)

  static resolveProxy(fileUrl: string, opt_proxy?: string): string {
    let protocol = url.parse(fileUrl).protocol;
    let hostname = url.parse(fileUrl).hostname;

    if (opt_proxy) {
      return opt_proxy;
    } else {
      // If the NO_PROXY environment variable exists and matches the host name,
      // to ignore the resolve proxy.
      // the checks to see if it exists and equal to empty string is to help with testing
      let noProxy: string = Config.noProxy();
      if (noProxy) {
        // array of hostnames/domain names listed in the NO_PROXY environment variable
        let noProxyTokens = noProxy.split(',');
        // check if the fileUrl hostname part does not end with one of the
        // NO_PROXY environment variable's hostnames/domain names
        for (let noProxyToken of noProxyTokens) {
          if (hostname.indexOf(noProxyToken) !== -1) {
            return undefined;
          }
        }
      }

      // If the HTTPS_PROXY and HTTP_PROXY environment variable is set, use that as the proxy
      if (protocol === 'https:') {
        return Config.httpsProxy() || Config.httpProxy();
      } else if (protocol === 'http:') {
        return Config.httpProxy();
      }
    }
    return undefined;
  }